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Counting to 20

Count objects carefully and connect each group to a number from 0 through 20.

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Beginner 15–20 minutes Counting & Cardinality
Counting & Cardinality Page 1 of 3
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At a Glance

Counting to 20
Binder SectionCounting & Cardinality
DifficultyBeginner
Estimated Time15–20 minutes
PrerequisitesNone
Essential Question

How can we count a group so that every object is counted once?

Visual Model
4Thousands 3Hundreds 2Tens 7Ones

4,327 = 4,000 + 300 + 20 + 7

Goals

Learning Targets

  • I can say the numbers from 0 to 20 in order.
  • I can touch or move each object as I count it.
  • I can write a number to tell how many objects are in a group.
Click each word

Interactive Vocabulary

Reveal one step at a time

Worked Examples

Example 1

Count a group of 8 stars

1

Point to the first star and say 1.

Example 2

Count an empty group

1

Look carefully for objects.

Notice and correct

Common Misconceptions

Saying numbers faster than pointing

Touch or move one object for each number word.

Counting an object twice

Move counted objects to a new spot or mark them.

Thinking the objects make a different number when rearranged

Count again to show the amount stays the same.

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Counting to 20

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Warm-Up Guided Independent Challenge
1
Quick Start

Warm-Up

Warm-up 1

Directions: Solve the problem. Show your thinking, then enter only your final answer.

Count 6 dots. What number tells how many dots there are?

Plan your solutionRecord what you know, choose a model or rule, and solve without revealing the final answer.
What do Iknow?Which rulefits?What must Ifind?

Choose how you want to work or answer.

2
We Do

Guided Practice

Guided 1

Directions: Use the lesson method. Show each step, then enter only your final answer.

Count 9 blocks. What number tells how many blocks there are?

Plan your solutionRecord what you know, choose a model or rule, and solve without revealing the final answer.
What do Iknow?Which rulefits?What must Ifind?

Choose how you want to work or answer.

Guided 3

Directions: Use the lesson method. Show each step, then enter only your final answer.

Count 14 counters arranged in two rows. How many counters are there altogether?

Picture the groups joiningUse the picture as you work through each step.
+show what joins or leaves, then find the new amount

Choose how you want to work or answer.

3
You Do

Independent Practice

Independent 1

Directions: Solve independently. Show your work, check it, then enter only your final answer.

Count a group of 11 circles. How many are there?

Picture the equal groupsUse the picture to organize what you know before you solve.
5 equal rows • 3 in each row

Choose how you want to work or answer.

Independent 2

Directions: Solve independently. Show your work, check it, then enter only your final answer.

Draw 17 dots, then write the numeral that tells how many you drew.

Picture what you are countingUse the picture to organize what you know before you solve.
12345678

Choose how you want to work or answer.

Independent 3

Directions: Solve independently. Show your work, check it, then enter only your final answer.

A group of 12 buttons is spread out. If the buttons are moved into a line, how many buttons will there be?

Picture the equal groupsUse the picture to organize what you know before you solve.
5 equal rows • 3 in each row

Choose how you want to work or answer.

4
Stretch Your Thinking

Challenge & Real-World Practice

🧩 Challenge

Show the number 15 in two different arrangements. Explain how you know both groups still have 15 objects.

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Success Criteria

Before you begin, I can…

  • I can count each object one time.
  • I know the last number I say tells how many.
  • I can match a group from 0 through 20 to its numeral.
1
Question 1

Which numeral means no objects?

2
Question 2

What should you do as you say each number?

3
Question 3

You count 1, 2, 3, 4, 5, 6, 7. How many objects are there?

4
Question 4

A group of 10 counters is rearranged. How many counters are there now?

5
Question 5

Which number comes right after 18?

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Lesson Complete

Great job on Counting to 20!

You reviewed the lesson, practiced the skill, and completed the mastery check.

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